> I gave Astra a hint from Opus and permission to change the test in question, which it did, and got a bit farther, but still ultimately didn't produce a working implementation (to be fair, Opus's was not completely working either, but was closer).

Going on a slight tangent, I find that I get the best results when I force Codex models (Astra/Sol) and Claude models (Opus/Fable) to consult each other (just have them build a simple skill). There are tasks that neither one can fully solve on their own, but their differences are large enough to make a difference when they collaborate.